PapersPast is a product of the National Library of New Zealand. It can be found on the web at http://paperspast.natlib.govt.nz/. PapersPast contains more than one million pages of digitised New Zealand newspapers and periodicals. The collection covers the years 1839 to 1920 and includes publications from all regions of New Zealand. The site is very user friendly and allows you to perform searches by key words, date, region or publication title. One of the things I love about this site is that the pages have been converted to OCR so you can copy the text as the computer interpreted it, directly into your text editing program or genealogy software. Of course the computer is never 100% correct in its interpretation so you will have to compare the OCR against the digital image.
If you have Maori ancestry you can view the Maori newspaper collection at http://nzdl.sadl.uleth.ca/. Look toward the bottom of the page to find the link to Nuipepa: Maori Newspapers. This site is written in Maori but does have English translations of the site however, the newspapers are all in the Maori language. It covers the Maori newspapers published during the period of 1842 to 1932
Australian Newspapers Online is a product of the National Library of Australia. This site is currently in beta and can be found at http://ndpbeta.nla.gov.au/. This site has digitised images of various newspapers from all regions of Australia during the period of 1803 to 1954. As in PapersPast, the Australian Newspapers Online compares the OCR text alongside the digitised image however this site has some very cool options that I had not seen before on other sites. First of all, you can correct the OCR text online for others to read. That means that any corrections you find will be permanently included in the online record. Additional options include the tagging of images and the ability to leave comments concerning the article.
These are all very user friendly sites and give us an idea of how online newspaper archives should perform. I know that Australia and New Zealand aren't always the hottest locations for genealogical research, but for those of us who have links to the land down under, these are great sites.